Front Ball Joints

While I did the brakes, I investigated a "clunk" in the front end. The lower ball joints were done this fall. The uppers need replacing. To diagnose, just take the ball joint betwen the jaws of a LARGE slip-joint pliers and squeeze. Try to pry the joint apart with a large pry bar. If you feel movement, replace the joint. This method works for all sorts of ball and socket joints, i.e. ball joints, sway bar end links, tie rod ends, etc.

These do not seem to be available aftermarket as just the ball joint. Mercedes sells it as a "kit" for $105. Aftermarket, you must purchase the entire joint and Upper Control Arm assembly ($186 - ouch). This looks like an easy job, but the car will need an alignment after they are done...